Patent GB-939793-A (GB)
Title: Organosilicon compositions
IPC: C08K5/05
Filed: 1959-12-01
Abstract: A composition for use in the cooling systems of internal combustion engines comprises an anhydrous single phase liquid mixture of an alcohol and an organosilicon compound containing an amino group linked to a silicon atom by a divalent hydrocarbon group containing at least 3 C atoms, wherein the amino group is attached to at least the third C atom removed from the Si atom, and wherein the Si atom is also linked to at least one alkoxy, aryloxy or siloxy group and from 0 to 2 monovalent hydrocarbon groups, divalent groups derived from oxirane compounds by opening of the oxirane ring, or NH2CnH2n-groups where n is at least 3 (see Group IV(a)).  Alcohols specified are methanol, ethanol, propanol; ethylene-, diethylene-, triethylene- and propylene-glycols; and glycerol.  Numerous examples of aminoorgano-silanes and -siloxanes are given, many of which are described in Specifications 847,803, 847,805, 882,051 and 882,052. In general the organosilicon compound is used in amount of from 0,0001 part to 10 parts (by weight) per 100 parts of alcohol. The compositions preferably contain buffers, viz, salts of strong bases and weak acids, many examples of which are given, the preferred ones being Na and K silicates and Mg, K, Na and Ca borates; these are generally used in amount of from 0,1 to 10 parts per 100 parts of alcohol used in the compositions.  The mixtures can be used alone as coolants or they can be diluted with the cooling water used in the cooling systems, so that they can contain from 0 to 900 parts of water per 100 parts of the alcohol. Anti-foam agents, identifying dyes, known inhibitors, sealants and anti-creep agents, may also be added.  Examples are given.ALSO:A composition for use in the cooling systems of internal combustion engines comprises an anhydrous single phase liquid mixture of an alcohol and an organosilicon compound containing an amino group linked to a silicon atom by a divalent hydrocarbon group containing at least 3 C atoms, wherein the amino group is attached to at least the third C atom removed from the Si atom, and wherein the Si atom is also linked to at least one alkoxy, aryloxy or siloxy group and from 0 to 2 monovalent hydrocarbon groups, divalent groups derived from oxirane compounds by opening of the oxirane ring, or NH2CnH2n-groups where n is at least 3.  Alcohols specified are methanol, ethanol, propanol; ethylene-, diethylene-, triethylene- and propylene-glycols; and glycerol.  Numerous examples of amino-organo-silanes and -siloxanes are given, many of which are described in Specifications 847,803, 847,805, 882,051 and 882,052. In general the organosilicon compound is used in amount of from 0,0001 part to 10 parts (by wt.) per 100 parts of alcohol.  The compositions preferably contain buffers, viz. salts of strong bases and weak acids, many examples of which are given, the preferred ones being Na and K silicates and Mg, Na, K and Ca borates; these are generally used in amount of from 0,1 to 10 parts per 100 parts of alcohol used in the compositions.  The mixtures can be used alone as coolants or they can be diluted with the cooling water used in the cooling systems, so that they can contain from 0 to 900 parts of water per 100 parts of the alcohol. Anti-foam agents, identifying dyes, known inhibitors, sealants and anti-creep agents, may also be added. Examples are given.  Reference has been directed by the Comptroller to Specification 795,894.